Process for washing artificial silk



I very large amount of water is Patented Sept. 8, 1 925.

manna Lulu! or woman,

enmnr, A'ssrerion 'ro Ac'rmn enema.

SCRAP! F UB Am IABBIKA'IION, O1 BERLHT,-GEBKANY.

rnoczss ron wasnnm ARTIFICIAL SILK.

Io Drawing.

To all whom it concern:

Be it known t at I,. Hmmerm Lrm- MERZHEIM, residing at Wolfen, 6 many, have invented certain new and useful Improvements. in Processes for. Washing Artificial Silk, for which I filed an a plica- -tion in Germany Mar. 12 1923, and 0 which the following is a specification.

Artificial silk wound on spools is washed until the washings areneutral for" the purpose of removing the residual precipitation 'quor. There are three rocesses for attaining this object. Acco 'ng to the first the 15 spools are placed in water which is flowing or. is renewed eriodicall Such a washing occu ies 6-8- ays'accor g to the kind ofspoo the mode of winding and the quantity of the material. The second process consists in a systematic sprinklin This, however,

does not completely attain thejdesired result. On the one hand it involves much manipulation and complicated arrangements, since the spools must be sub'ected to the water spray in countercurrent, ut even when this has been done it frequently happens 1 that the silk is incompletely washed and suffers damage in dryin The process .on a large scale is only satis acto when a and the period is prolonged. Thelthird 1' a: which on'ithe principle applied in processes of and dyeing spools SI; and cops; Even in this case thereare dlfliculties'with reepectto the apparatus and the operation and it is not eas toavoid irregularities'in the washing an -conseq1iint-dam' age of the silk. The second and t rd-proc- '10 above described are-examples of what will be referred to hereinafter as washing with 'v'vatereiap liedb means'as e first process accord-- m to which the simplyimmereed a in a body of water which; is renewed by continuous or replacement.

a citizen of the German Republic,- Kr. Bitterfeld, Gen

is the so -called pressure washing Application ma llamas, 1024. Serial no. 701,886.

According to the present invention the several difliculties are overcome by combining the washing with water applied by me- I chanical means with wa'shin'g in a vat containing renewed water. For this purpose thespools, preferably mounted on suitable transportable frames, are subjected to a preliminary washing, for instance by pumping water through the perforated s ls or by sprinkling, and then are place in a vat where washing is carried to completionwith the aid of renewed water, such as flowing water. The renewal of the water can likewise take place" periodically. This subse ,quent washing mayoccupy'12-4 8hours ac-' cording to the thoroughness of the-preliminary washing. There is achieved in this way a completely uniform washing and all damage to the thread in the subsequent dry ing is prevented. The consumption of water i's-s1'naller than'that in any of the known processes since the waternsed in the subse-. quent washing, which, of course, may be warm, is used for the preliminary washing. In a. properly conducted" operation there 13 so little water used that-the acid which it acquires, is suflicient to make it advantageous to use this acid water forpreparing the preci itation bath.

After aving described and ascertained the nature of .the invention and in what manner the same is to be performed it is c1aimed, p

' A two-phase process'of' washing artificial silk which comprises subjecting spools thereof to a relative y .sh'ort preliminary washing with water forcibly a plied by mechanica means and thereafter immersing-thigpools for a relativel long treatment in a as water 'which' is renewed untilthe was g is complete. v

In testimony whereof I afiix my signature.

19p. .HERMANN Lummazlmma 

